Polygons and colors do not appear in qgis2web export

Question

I have been trying to export a map from QGIS using the qgis2web plugin. But my polygons and classification colors are not displayed in the exported HTML file, I only can see the Google Street Map layer.

My map has a layer for Google Street Map and another with polygons from a shapefile, colored based on one of the columns from a CSV file.

Here's the map:

When I try to export the map (I tried OpenLayers and Leaflet), the preview is what I expect:

but the final HTML file only displays the Google Street Map layer. Not the polygons/colors.

Any thoughts on why is that happening?

EDIT: Included the 'appearance tab'

Answer 1

My teammate and I had this exact issue. It turned out to be because the attribute name used for the color classification was case-sensitive in qgis2web.